CHARLOTTESVILLE A chaotic and violent day turned to tragedy Saturday as hundreds of white nationalists, neo-Nazis, Ku Klux Klan members planning to stage what they described as their largest rally in decades to take America back clashed with counterprotesters in the streets and a car plowed into crowds, killing one person and injuring 19 others.

Video recorded at the scene shows a gray car accelerating into crowds on a pedestrian mall, sending bodies flying and then reversing at high speed, hitting yet more people. Witnesses said the street was filled with people opposed to the white nationalists who had come to town bearing Confederate flags and anti-Semitic epithets.

City officials said it was too soon to tell whether the car crash was intentional, but the driver of one of the vehicles was taken into custody.

Angela Taylor, a spokeswoman for UVA Medical Center, said 20 people were brought to the hospital in the early afternoon after three cars collided in a pedestrian mall packed with people, many of them counterprotesters. She confirmed that one had died, but declined to release further details.

Earlier, police had evacuated a downtown park as rallygoers and counterprotesters traded blows and hurled bottles and chemical irritants at one another, putting an end to the noon rally before it officially began.

Gov. Terry McAuliffe declared a state of emergency shortly before 11 a.m., saying he was disgusted by the hatred, bigotry and violence and blaming mostly out-of-state protesters.

Despite the decision to quash the rally, clashes continued on side streets and throughout the downtown. In the early afternoon, three cars slammed into each other in a pedestrian mall at Water and Fourth Streets, sending bystanders running and screaming.

I am heartbroken that a life has been lost here, said Charlottesville Mayor Michael Signer in a tweet. I urge all people of good will–go home.

Elected leaders in Virginia and elsewhere urged peace, blasting the white supremacist views on display in Charlottesville as ugly. U.S. House Speaker Paul D. Ryan (R-Wis.) called their display repugnant.

But President Trump, known for his rapid-fire tweets, remained silent throughout the morning. It was after 1 p.m. when he weighed in, writing on Twitter: We ALL must be united & condemn all that hate stands for. There is no place for this kind of violence in America. Lets come together as one!

In brief remarks at a late-afternoon news conference to discuss veterans health care, Trump said that he was following the events in Charlottesville closely. The hate and the division must stop and must stop right now, Trump said, without specifically mentioning white nationalists or their views. We condemn in the strongest possible terms this egregious display of hatred, bigotry, and violence on many sides. On many sides.

Former Ku Klux Klan leader David Duke, a Trump supporter who was in Charlottesville Saturday, quickly replied. I would recommend you take a good look in the mirror & remember it was White Americans who put you in the presidency, not radical leftists, he wrote.

Dozens of the white nationalists in Charlottesville were wearing red Make America Great Again hats. Asked by a reporter in New Jersey whether he wanted the support of white nationalists, Trump did not respond.

Even as crowds began to thin Saturday afternoon, the town remained unsettled and on edge. Onlookers were deeply shaken at the pedestrian mall, where ambulances had arrived to treat victims of the car crash.

Chan Williams, 22, was among the counterprotesters at the pedestrian mall, chanting Black Lives Matter and Whose streets? Our streets! The marchers blocked traffic, but Williams said drivers werent annoyed. Instead, they waved or honked in support.

So when she heard a car engine rev up and the people in front of her ducking out of the way of a moving car, she didnt know what to think.

I saw the car hit bodies, legs in the air, she said. You try to grab the people closest to you and take shelter.

Williams and her friend, George Halliday, ducked into a local shop with an open door and called their moms immediately. An hour later, the two were still visibly upset.

I just saw shoes on the road, Halliday, 20, said. It all happened in two seconds.

Saturdays Unite the Right rally was meant to protest the planned removal of a statue of Confederate General Robert E. Lee. The city of Charlottesville voted to remove the statue earlier this year, but it remains in the Emancipation Park, formerly known as Lee Park, pending a judges ruling expected later this month.

Tensions began to escalate Friday night as hundreds of white nationalists marched through the campus of the University of Virginia, chanting White lives matter! You will not replace us! and Jews will not replace us!

They were met by counterprotesters at the base of a statue of Thomas Jefferson, who founded the university. One counterprotester apparently deployed a chemical spray, which sent about a dozen rally goers seeking medical assistance.

On Saturday morning, men in combat gear some wearing bicycle and motorcycle helmets and carrying clubs and sticks and makeshift shields had fought each other in the downtown streets, with little apparent police interference. Both sides sprayed each other with chemical irritants and plastic bottles were hurled through the air.

A large contingent of Charlottesville police officers and Virginia State Police troopers in riot gear were stationed on side streets and at nearby barricades but did nothing to break up the melee until around 11:40 a.m. Using megaphones, police then declared an unlawful assembly and gave a five-minute warning to leave Emancipation Park.

The worst part is that people got hurt and the police stood by and didnt do a goddamn thing, said David Copper, 70, of Staunton, Va.

State Del. David Toscano (D-Charlottesville), minority leader of Virginias House, praised the response by Charlottesville and state police.

Asked why police did not act sooner to intervene as violence unfolded, Toscano said he could not comment. But they trained very hard for this and it might have been that they were waiting for a more effective time to get people out of Emancipation Park, he said.

By early afternoon, hundreds of rallygoers had made their way to a larger park two miles to the north. Duke, speaking to the crowd, said that European Americans are being ethnically cleansed within our own nation and called Saturdays events the first step toward taking America back.

White nationalist leader Richard Spencer also addressed the group, urging people to disperse. But he promised that they would return for a future demonstration, blaming Saturdays violence on counterprotesters.

In an interview, Spencer said he was beyond outraged that the police had declared the planned rally an unlawful assembly.

I never before thought that I would have my country cracking down on me and on free speech, he said in an interview. We were lawfully and peacefully assembled. We came in peace and the state cracked down.

He said that protesters attacked rallygoers but also acknowledged that maybe someone threw a first punch on our side. Maybe that happened. I obviously didnt see everything.

By 11 a.m., several fully armed militias and hundreds of right-wing rallygoers had poured into the small downtown park that was to be the site of the rally.

Counterprotesters held Black Lives Matter signs and placards expressing support for equality and love as they faced rallygoers who waved Confederate flags and posters that said the Goyim know, referring to non-Jewish people, and the Jewish media is going down.

No Trump! No KKK! No fascist USA! the counterprotesters chanted.

Too late, f—–s! a man yelled back at them.

Michael Von Kotch, a Pennsylvania resident who called himself a Nazi, said the rally made him proud to be white.

He said that hes long held white supremacist views and that Trumps election has emboldened him and the members of his own Nazi group.

We are assembled to defend our history, our heritage and to protect our race to the last man, Von Kotch said, wearing a protective helmet, sporting a wooden shield and a broken pool cue. We came here to stand up for the white race.

Naundi Cook, 23, who is black, said she came to Saturdays counterprotests to support her people, but shes never seen something like this before.

When violence broke out, she started shaking and got goose bumps.

Ive seen people walking around with tear gas all over their face all over their clothes. People getting maced, fighting, she said. I didnt want to be next.

Cook said she couldnt sit back and watch white nationalists descend on her town. She has a three-year-old daughter to stand up for, she said.

Right now, Im not sad, she said once the protests dispersed. Im a little more empowered. All these people and support, I feel like were on top right now because of all the support that we have.

Saturday marked the second time in six weeks that Charlottesville has faced a protest from white supremacist groups for its decision to remove the statue of Robert E. Lee. On July 8, about three dozen members of a regional Ku Klux Klan group protested in the city.

City officials, concerned about crowds and safety issues, had tried to move Saturdays rally to a larger park away from the citys downtown. But Jason Kessler, the rallys organizer, filed a successful lawsuit against the city that was supported by the Virginia ACLU, saying that his First Amendment rights would be violated by moving the rally.

[Decades before Charlottesville, the Ku Klux Klan was dead. The first Hollywood blockbuster revived it.]